JP2002013858A - Controller and control method for inverter compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller and a control method for an inverter compressor which can optimize the operation efficiency by estimating the load of and the balance of freezing capacity by information about temperature in refrigerator. SOLUTION: This controller is equipped with a cooling unit which has an evaporator 3, a condenser 5, and an inverter compressor 10, and a controller 9 which controls this, and the controller 9 is equipped with a capacity excess and deficiency judger 13 which judges the excess and deficiency of freezing capacity, based on the measured value of the temperature gradient of a good chamber 1 and the desired value 12 of a preset temperature gradient, and a revolution director 124 which outputs the revolution command of the compressor 10, based on the judgment result. The temperature gradient desired value 12 of the capacity excess and deficiency judger 13 is set based on an operation mode and the number of evaporators in operation. An initial revolution director 15 sets the initial revolution of the compressor 10, based on the information about the number of evaporators in operation and the operation suspension time, etc., of the compressor 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device and a control method of an inverter compressor constituting a refrigeration cycle of a vending machine. More specifically, the present invention estimates a balance between a load and a refrigerating capacity based on temperature information in a refrigerator. The present invention relates to a control device and a control method of an inverter compressor for controlling the rotation speed of the inverter compressor so that the operation efficiency is maximized.

[0002]

2. Description of the Related Art A vending machine for heating and cooling a product (for example, a canned beverage) is provided with a constant speed compressor constituting a refrigerating cycle, and exerts a predetermined refrigerating capacity by ON / OFF controlling the compressor. ing. The interior of the warehouse for storing commodities is usually divided into a plurality of rooms (for example, three rooms), and a cooling operation or a heating operation is performed for each room by a controller. Since the present invention to be described later relates to a cooling operation, a vending machine having three chambers will be described as an example with a cooling device as a center.

FIG. 14 is a schematic diagram showing a conventional vending machine, FIG. 15 is a block diagram showing an input / output relationship of a controller, FIG. 16 is a block diagram showing a control method of a constant speed compressor, and FIG. FIG. 18 is a flowchart illustrating a method of controlling the solenoid valve and the compressor according to the temperature in the refrigerator, and FIG. 18 is a timing chart illustrating operations of the solenoid valve and the compressor according to the temperature in the refrigerator.

As shown in FIG. 14, the vending machine room 1 is divided into a left room 1a, a middle room 1b, and a right room 1c, and the evaporator 3 and the inside of the room are provided for each room 1a, 1b, 1c. Temperature sensor 4
And The machine room 2 includes a condenser 5, a constant speed compressor 6, a solenoid valve 7, a capillary tube 8, and the like, and these are connected to the evaporator 3 by piping to form a refrigeration cycle.

A controller 9 for controlling each component of the vending machine is configured to selectively operate three modes of "CCC", "CCH" and "CHH" by selecting an operation mode by a switch or the like. ing. here,
“CCC” means all-room cold (commodity cooling) operation, “CCH” means two-room cold operation, one-room hot (product heating) operation, and “CHH” means one-room cold operation. This means two-room hot operation. The hot operation is performed by a heater (not shown), and the cold operation is performed by a refrigerator.

As shown in FIGS. 15 and 16, the controller 9 includes temperature information (inside temperature Tr, evaporating temperature Te, etc.) from the inside temperature sensor 4 for each of the chambers 1a, 1b, 1c.
, The open / close control of the solenoid valve 7 and the ON / OFF control of the constant speed compressor 6 are performed to perform the cold operation.

Next, a method of controlling product cooling will be described by taking the CCC mode as an example. The cooling operation of the product includes a pull-down operation corresponding to cooling immediately after the product is put in, and a steady operation in which the cooled product is kept constant at about 4 ° C. Since the present invention described below relates to this steady operation, the steady operation will be described.

As shown in FIG. 17, first, the inside temperature of all the rooms 1a, 1b, 1c is read by the inside temperature sensor 4 (step S10). Then, based on this temperature information, the ON / OF of the solenoid valve 7 is set for each of the chambers 1a, 1b, 1c.
F control is performed (step S11). That is, for example, when the internal temperature is 4 ° C. or higher, the solenoid valve 7 is turned on,
When the internal temperature is 0 ° C. or lower, the electromagnetic valve 7 is turned off (step S11).

Next, control of the constant speed compressor 6 is performed (step S12). That is, for example, if at least one solenoid valve 7 is ON, the constant speed compressor 6 is turned ON, and if all the solenoid valves 7 are OFF, the constant speed compressor 6 is turned ON.
A steady operation is performed by setting the FF (step S1).
2). The operation timings of the solenoid valves 7 and the constant speed compressors 6 in the respective chambers 1a, 1b, 1c are as shown in FIG.

[0010]

Generally, vending machines operate in a CCC mode in summer, a CCH mode in spring and autumn, and a CHH mode in winter. Therefore, the load on the refrigerator greatly fluctuates due to changes in the outside air temperature, the operation mode, and the like every season.

However, in the prior art, as described above, the constant speed compressor 6 is used as the compressor, and the ON / OFF
Since the operation responds to the load fluctuation, the refrigerating capacity exerted is almost the same between the cold single-room operation in winter (light load) and the cold operation in all rooms in summer (high load).

On the other hand, the capacity of the constant speed compressor 6 is selected according to the maximum load (during the summer pulldown). There was a problem that the operation was wasted, and the energy loss increased particularly in winter.

The present invention has been made in view of the above, and provides a control device and a control method of an inverter compressor which can estimate a balance between a load and a refrigerating capacity based on temperature information in a refrigerator and optimize operation efficiency. The purpose is to do.

[0014]

In order to achieve the above object, a control device for an inverter compressor according to claim 1 of the present invention has at least an evaporator, a condenser, and an inverter compressor. A controller for the inverter compressor in a vending machine having a cooling unit and a controller for controlling the cooling unit, wherein the controller is configured to measure a temperature gradient of a product room and a preset temperature gradient target value. And a rotation speed command unit that outputs a rotation speed command of the inverter compressor based on the determination result of the capacity excess / deficiency determination unit based on the determination result. Things.

The capacity excess / shortage determining section makes a determination of, for example, three levels of capacity excess, appropriate, and insufficient according to the temperature gradient in the refrigerator. The rotational speed command unit controls the rotational speed of the inverter compressor according to the result of the excess / deficiency determination by the capacity excess / deficiency determination unit. That is, when the refrigerating capacity is insufficient, the refrigerating capacity is increased by increasing the current rotational speed N by ΔN,
If the capacity is excessive, the refrigeration capacity is reduced by decelerating the current speed N by ΔN, and if the capacity is determined to be appropriate, the current speed N is maintained.

As described above, the load fluctuation is detected by the temperature gradient inside the refrigerator, and the rotation speed of the inverter compressor is controlled so as to operate at the temperature gradient that minimizes power consumption. The cooling system of the vending machine can be operated.

According to a second aspect of the present invention, there is provided a method for controlling an inverter compressor, comprising: a cooling unit having at least an evaporator, a condenser, and an inverter compressor; and a controller for controlling the cooling unit. It is a control method of the inverter compressor in a vending machine provided, wherein the controller determines the excess or deficiency of the refrigeration capacity based on a temperature gradient measured value of the product room and a preset temperature gradient target value, The rotation speed command of the inverter compressor is output based on the determination result of the refrigerating capacity.

[0018] The controller according to the temperature gradient in the refrigerator,
For example, three stages of excessive capacity, appropriate capacity, and insufficient capacity are determined, and the rotational speed of the inverter compressor is controlled according to the result of the determination. That is, when the refrigerating capacity is insufficient, the refrigerating capacity is increased by increasing the current rotational speed N by ΔN,
If the capacity is excessive, the refrigeration capacity is reduced by decelerating the current speed N by ΔN, and if the capacity is determined to be appropriate, the current speed N is maintained.

As described above, the load fluctuation is detected by the temperature gradient in the refrigerator, and the rotation speed of the inverter compressor is controlled so as to operate at the temperature gradient that minimizes the power consumption. The cooling system of the vending machine can be operated, and an energy saving effect can be obtained.

In the control device for an inverter compressor according to a third aspect of the present invention, the target value of the temperature gradient of the excess / deficiency judging section is set based on the operation mode and the number of operation evaporators. Therefore, the refrigerator can be operated so that the operation efficiency of the refrigerator becomes maximum (minimum power consumption) according to each operation state, and the cooling system of the vending machine can be operated with the minimum necessary energy.

According to a fourth aspect of the present invention, in the control device for an inverter compressor, the rotational speed command unit includes an initial rotational speed command unit and a steady-state rotational speed command unit. , At the time of starting the inverter compressor and when the number of operating evaporators changes, at least the operating mode,
The operation suspension time of the inverter compressor, the outside air temperature, the vending machine surface temperature, the condenser suction air temperature, any one of the four seasons information, or the initial rotation speed of the inverter compressor based on the information obtained by combining them. Setting, the rotation speed command to the inverter compressor is maintained at the initial rotation speed for a certain period of time, and the steady-state rotation speed command unit operates for a certain period of time at the initial rotation speed, and outputs the output from the excess / shortage determining unit. The number of revolutions of the inverter compressor is controlled based on the number of revolutions.

Thus, for example, when the operation stoppage time of the inverter compressor is short, it is determined that the amount of heat entering from outside is large and the temperature rise in the refrigerator is fast, and the initial rotation speed can be set high. Other information can be similarly used. Therefore, it is possible to efficiently shift to the steady operation, and to operate the cooling system of the vending machine with the minimum necessary energy.

In the control device for an inverter compressor according to a fifth aspect of the present invention, the switching from the initial rotation speed command unit to the steady rotation speed command unit in the rotation speed command unit is performed based on the internal temperature. Therefore, it is possible to quickly and reliably perform an operation corresponding to the current load condition, and to operate the cooling system of the vending machine with the minimum necessary energy.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a control device and a control method for an inverter compressor according to the present invention will be described in detail with reference to the drawings. The present invention is not limited by the embodiment.

FIG. 1 is a block diagram showing a control device of an inverter compressor according to an embodiment of the present invention, and FIG.
FIG. 3 is a block diagram showing an input / output relationship of a controller, FIG. 4 is a table showing a temperature gradient target value determined according to an operation mode and the number of operation evaporators, and FIG. FIG. 6 is a table showing the results of judging the excess or deficiency of the refrigeration capacity determined according to the temperature gradient in the refrigerator, and FIG. 6 is a table showing the rotation speed of the inverter compressor set according to the result of the judgment of the excess or deficiency of the refrigeration capacity. .

FIG. 7 is a table showing the initial rotation speed (at start-up) determined according to the load estimation based on the operation suspension time of the inverter compressor, and FIG. 8 is based on the operation suspension time of the inverter compressor. FIG. 9 is a table showing the initial rotation speed (when the number of operating evaporators changes) determined according to the load estimation.
FIG. 4 is a table showing an initial rotation speed (at start-up) determined according to a load estimation based on an outside air temperature.

FIG. 10 is a table showing the initial rotational speed (when the number of operating evaporators is changed) determined according to the load estimation based on the outside air temperature. FIG. 11 is a table showing the load estimation based on the four seasons. Table showing the determined initial rotation speed (at start-up), FIG.
2 is a table showing the initial rotation speed (when the number of operating evaporators changes) determined according to the load estimation based on the four seasons, FIG.
5 is a flowchart showing a control method of the inverter compressor.

In the following description, the same components as those shown in the above-mentioned prior art are denoted by the same reference numerals, and redundant description will be omitted.

First, the overall structure will be described with reference to FIGS.
It will be described based on. The operation method of the solenoid valve 7 and the start / stop control of the inverter compressor 10 are the same as those in the related art. The difference from the case of the prior art is that an inverter compressor 10 is provided in FIG.
Inverter 11 for controlling the inverter compressor 10
It is to have.

Next, a method of controlling the number of revolutions at the time of starting the inverter compressor 10 will be described with reference to FIG. The temperature gradient target value 12 is determined as shown in FIG. 4 according to the operation mode and the number of operation evaporators (the number of the product rooms 1 in which the solenoid valve 7 is open). Here, the temperature gradient target values (A1 to
In A12), a value at which the operating efficiency of the refrigerator becomes maximum (minimum power consumption) is determined in advance by experiments or the like in accordance with each operating condition, and is set.

As shown in FIG. 5, the excess capacity deficiency judging section 13 is formed so as to determine three levels of excess capacity, appropriate capacity, and insufficient capacity as shown in FIG. a1 and a2 are
This is a predetermined temperature gradient value obtained in advance as described above. As shown in FIG. 1, the temperature information in the product room 1 that is changed by controlling the rotation speed of the inverter compressor 10, which will be described later, is detected by the temperature sensor 4 in the refrigerator, and is fed back to the determination by the excess / shortage determining unit 13. Is done.

The rotational speed command unit 14 controls the rotational speed of the inverter compressor 10 as shown in FIG. That is, when the refrigeration capacity is insufficient, the current rotational speed N is △ N
The refrigeration capacity is increased by only increasing the speed, and if the capacity is excessive, the refrigeration capacity is reduced by decelerating the current rotation speed N by △ N. If it is determined that the capacity is appropriate, the current rotation speed N is maintained. I do.

At the time of start-up and when the number of operating evaporators changes, as shown in FIGS. 7 and 8, the OFF time (operation stop time of the inverter compressor 10) or the load estimation based on the number of operating evaporators is performed. The initial rotation speed is determined by the initial rotation speed control unit 15 (see FIG. 1), and the predetermined rotation speeds (N1 to N15, N16 to N25) shown in FIGS.
After a certain period of operation, the above-described rotation speed control is performed. For example, when the OFF time is short, it is determined that the amount of heat entering from the outside is large and the internal temperature rise is fast, and the initial rotation speed is set to be high.

Instead of the OFF time shown in FIGS. 7 and 8, as shown in FIGS. 9 and 10, a load is estimated based on the outside air temperature, and the initial rotational speed (N26 to N5) is determined.
2, N53 to N70). Further, the initial rotation speed may be determined by performing load estimation based on the surface temperature of the vending machine or the temperature of the intake air of the condenser 5 instead of the outside air temperature.

Instead of the OFF time shown in FIGS. 7 and 8, a load estimation based on four seasons (calendar) information is performed as shown in FIGS. 11 and 12, and the initial rotation speeds (N71 to N82, N83 to N90) may be determined.

Next, the control operation described above will be described with reference to FIG. First, it is determined whether or not there is a start command of the inverter compressor 10 (step S20). If there is a command (Yes at Step S20), the operation mode and the number of operation evaporators are read (Step S21), and the temperature gradient target value 12 shown in FIG. 4 is read. If there are no directives,
It waits until there is a command (No at Step S20).

When the temperature gradient target value 12 is read, the initial rotation speed shown in FIGS. 7 to 12 is read (step S23), and the inverter compressor 10 is operated at the initial rotation speed for a certain period of time. (Step S24).

Subsequently, the internal temperature obtained by the internal temperature sensor 4 is read (step S25), and a temperature gradient is detected (step S26). Capacity excess / shortage judgment unit 13
Then, based on this temperature gradient value, it is determined whether the refrigerating capacity is excessive or insufficient as shown in FIG. 5 (step S27), and the rotation speed command unit 14 outputs a rotation speed command (step S28).

Then, it is determined whether or not the number of operating evaporators has changed (step S29). If there is a change in the number of operating evaporators (Yes at Step S29), the process returns to Step 22 for reading the temperature gradient target value 12. On the other hand, when there is no change in the number of operating evaporators (No at Step S29), it is determined whether or not there is a command to stop the inverter compressor 10 (Step S30).

If there is a command to stop the inverter compressor 10 (Yes at step S30), the process waits until there is a command to start (step S20). When there is no stop command of the inverter compressor 10 (No at Step S30), the internal temperature is read (Step S25), and the above-described rotation speed control is performed (Steps S26 to S28).

As described above, according to the control device and the control method of the inverter compressor according to this embodiment, the load fluctuation such as the operation mode and the outside air temperature is detected by the temperature gradient in the refrigerator, and the power consumption is minimized. Since the rotation speed of the inverter compressor 10 is controlled so as to operate at a certain temperature gradient, the cooling system of the vending machine can be operated with the minimum necessary energy, and an energy saving effect can be obtained.

In the above embodiment, when determining the initial rotation speed of the inverter compressor 10, the OFF time, the outside air temperature, the surface temperature of the vending machine, the suction air temperature of the condenser 5, the four seasons (calendar) information However, the present invention is not limited to this, and the load estimation may be performed based on any combination of these information and other information. In determining the number of revolutions during steady operation, such information may be used.

As such other information, for example,
Information such as the evaporating pressure / temperature of the refrigerant, the condensing pressure / temperature, the product temperature, the opening / closing of the solenoid valve 7, and the ON / OFF of the internal fan can also be used.

[0044]

As described above, according to the inverter compressor control apparatus of the present invention (claim 1), a cooling unit having at least an evaporator, a condenser, and an inverter compressor is provided. A controller for the inverter compressor in a vending machine having a controller for controlling the cooling unit, wherein the controller is based on a temperature gradient measured value of the product room and a preset temperature gradient target value. Since there is provided an excess / deficiency judging unit for judging excess or deficiency of the refrigeration capacity, and a rotation speed command unit for outputting a rotation speed command of the inverter compressor based on the judgment result of the excess / deficiency judgment unit, the load fluctuation. The temperature of the refrigerator is controlled by the temperature gradient inside the refrigerator, and the rotation speed of the inverter compressor can be controlled to operate at the temperature gradient that minimizes the power consumption. It is possible to operate the retirement system.

According to the inverter compressor control method of the present invention (claim 2), a cooling unit having at least an evaporator, a condenser, and an inverter compressor is controlled, and the cooling unit is controlled. A method of controlling the inverter compressor in a vending machine including a controller, wherein the controller determines whether the refrigerating capacity is excessive or insufficient based on a temperature gradient measured value of a product room and a preset temperature gradient target value. It is determined, and the rotation speed command of the inverter compressor is output based on the determination result of the refrigeration capacity. Therefore, the load fluctuation is captured by the temperature gradient in the refrigerator, and the operation is performed with the temperature gradient that minimizes the power consumption. As described above, the rotation speed of the inverter compressor can be controlled, and the cooling system of the vending machine can be operated with the minimum necessary energy.

Further, according to the inverter compressor control device of the present invention (claim 3), the temperature gradient target value of the capacity excess / deficiency determination section is set based on the operation mode and the number of operation evaporators. Therefore, the refrigerator can be operated so that the operation efficiency of the refrigerator becomes maximum (minimum power consumption) according to each operation condition, and the cooling system of the vending machine can be operated with the minimum necessary energy.

According to the control device for an inverter compressor according to the present invention (claim 4), the rotational speed command unit includes an initial rotational speed command unit and a steady-state rotational speed command unit, and At the time of starting the inverter compressor and changing the number of operation evaporators, the command unit determines at least the operation mode, the number of operation evaporators, the operation suspension time of the inverter compressor, the outside air temperature, the vending machine surface temperature, the condenser suction air. Temperature, one of the four seasons information, or the combination of these, the initial rotation speed of the inverter compressor is set, and the rotation speed command to the inverter compressor is maintained at the initial rotation speed for a certain period of time. , The steady-state rotational speed command,
After operating for a certain period of time at the initial rotation speed, the rotation speed of the inverter compressor is controlled based on the output of the capacity excess / shortage determination unit. The initial rotation speed can be set high by judging that the amount of heat penetrating into the chamber is large and the temperature rise in the refrigerator is fast. Other information can be similarly used. Therefore, it is possible to efficiently shift to the steady operation, and to operate the cooling system of the vending machine with the minimum necessary energy.

According to the inverter compressor control device of the present invention (claim 5), switching from the initial rotation speed command unit to the steady rotation speed command unit in the rotation speed command unit is performed by:
Since the operation is performed based on the temperature in the refrigerator, the operation according to the current load condition can be performed quickly and reliably, and the cooling system of the vending machine can be operated with the minimum necessary energy.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control device of an inverter compressor according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a vending machine.

FIG. 3 is a block diagram showing an input / output relationship of a controller.

FIG. 4 is a table showing a temperature gradient target value determined according to an operation mode and the number of operation evaporators.

FIG. 5 is a table showing the determination result of excess or deficiency of the refrigerating capacity determined according to the temperature gradient in the refrigerator.

FIG. 6 is a table showing the number of revolutions of the inverter compressor set according to the determination result of excess or deficiency of the refrigerating capacity.

FIG. 7 is a table showing an initial rotation speed (at start-up) determined according to a load estimation based on an operation suspension time of the inverter compressor.

FIG. 8 is a table showing the initial rotation speed (when the number of operating evaporators changes) determined according to the load estimation based on the operation suspension time of the inverter compressor.

FIG. 9 is a table showing an initial rotation speed (at start-up) determined according to a load estimation based on an outside air temperature.

FIG. 10 is a table showing the initial rotation speed (when the number of operating evaporators changes) determined according to the load estimation based on the outside air temperature.

FIG. 11 is a table showing an initial rotation speed (at startup) determined according to load estimation based on four seasons.

FIG. 12 is a table showing the initial rotation speed (when the number of operating evaporators changes) determined according to the load estimation based on the four seasons.

FIG. 13 is a flowchart illustrating a control method of the inverter compressor.

FIG. 14 is a schematic view showing a conventional vending machine.

FIG. 15 is a block diagram showing an input / output relationship of a controller.

FIG. 16 is a block diagram showing a control method of the constant speed compressor.

FIG. 17 is a flowchart showing a method for controlling the solenoid valve and the compressor according to the temperature in the refrigerator.

FIG. 18 is a timing chart showing operations of the solenoid valve and the compressor according to the temperature in the refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commodity room 1a Left room 1b Middle room 1c Right room 2 Machine room 3 Evaporator 4 Inside temperature sensor 5 Condenser 7 Solenoid valve 8 Capillary tube 9 Controller 10 Inverter compressor 11 Inverter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G07F 9/10 102 G07F 9/10 102A (72) Inventor Naoki Ishita 1 Tanabe Nitta, Kawasaki-ku, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 Inside Fuji Electric Co., Ltd. (72) Inventor Toshihisa Furuta 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture F-term inside Fuji Electric Co., Ltd. 3E044 AA01 CA09 CB05 CC08 DB16 FB11 3L045 AA02 BA01 CA02 DA02 EA01 GA07 HA03 HA07 LA06 LA07 MA02 MA13 NA16 PA01 PA02 PA03 PA05

Claims (5)

[Claims] 1. A vending machine having at least a cooling unit having an evaporator, a condenser, and an inverter compressor, and a controller for controlling the cooling unit. The controller is configured to determine whether the refrigerating capacity is excessive or insufficient based on the measured temperature gradient of the product room and a preset temperature gradient target value. And a rotation speed command unit that outputs a rotation speed command of the inverter compressor based on the following. 2. A method for controlling an inverter compressor in a vending machine including at least a cooling unit having at least an evaporator, a condenser, and an inverter compressor; and a controller for controlling the cooling unit. The controller determines whether the refrigerating capacity is excessive or insufficient based on the temperature gradient measured value of the product room and a preset temperature gradient target value, and determines the rotation of the inverter compressor based on a result of the determination of the refrigerating capacity. A method of controlling an inverter compressor, wherein a number command is output. 3. The temperature gradient target value of the capacity excess / deficiency determination section is:
The control device for an inverter compressor according to claim 1, wherein the setting is performed based on an operation mode and the number of operation evaporators. 4. The rotation speed command unit includes an initial rotation speed command unit and a steady-state rotation speed command unit, wherein the initial rotation speed command unit starts the inverter compressor and changes the operation evaporator number. At least driving mode,
Number of operating evaporators, downtime of the inverter compressor,
Outside air temperature, vending machine surface temperature, condenser suction air temperature, any of the four seasons information, or the combination of these, set the initial rotation speed of the inverter compressor, The rotation speed command is maintained at the initial rotation speed for a certain period of time, and the steady-state rotation speed command unit is operated for a certain period of time at the initial rotation speed, and then the rotation speed of the inverter compressor based on the output of the capacity excess / deficiency determination unit. 4. The control device for an inverter compressor according to claim 1, wherein the control is performed. 5. The control of the inverter compressor according to claim 4, wherein the switching from the initial rotation speed control unit to the steady rotation speed control unit in the rotation speed control unit is performed based on a temperature in the refrigerator. apparatus.